OPINION: Mueller Delivered a Message. Washington Couldn’t Agree on What It Was.

At long last, the sphinx of Washington spoke on Wednesday, and here is what President Trump heard: “Case closed.” Here is what the president’s adversaries heard: “Time to impeach.”

The much-anticipated public debut of Robert S. Mueller III as special counsel proved as polarizing and unsatisfying as almost everything else about the two-year investigation he led into Russia’s interference in the 2016 election in support of Mr. Trump’s candidacy.

In his dry, lawyerly, scripted statement, Mr. Mueller gave voice for the first time to the damning details he uncovered about...